WorksheetsGoing AudioVisual
Total questions: 16
Worksheet time: 16mins
What is a pixel?
A dot or square in an image or computer screen
A type of digital image file
A line in an image or computer screen
A layer in a Paint.NET image
What is meant by the term 'resolution'?
The amount of pixels in an image or computer screen.
The physical size of a computer screen
The amount of different colours in an image
How fast an image is loaded
What is meant by Colour Depth?
Number of pixels in the image
The number of colours available for each pixel
How pixelated the image is
Select one advantage and one disadvantage of reducing the colour depth of some images from 24-bit to 8-bit
File sizes are way bigger so less storage is needed
File sizes are smaller, the images will upload quicker to the internet
Images will be much lower quality
The Pythons will constrict the number of bits that is passable through the CPU
What is meant by the term 'aspect ratio'?
The physical size of a computer screen
The ratio of horizontal to vertical pixels in an image or screen
The ratio of black to white in an image
The ratio of transparent and opaque pixels
What do the acronyms RGB and CMYK refer to? Explain
Tick all the file extensions that relate to digital images
.gif
.jpg
.png
.zip
.exe
A bitmap image is 10 pixels high, 10 pixels wide and has a colour depth of 4 bits. What is the file size (in bits) of the image?
A bitmap image is 30 pixels high, 100 pixels wide and has a colour depth of 4 bits. What is the file size (in bits) of the image?
Draw your best cat
What binary numbers are missing from the grid, which represents the 1-bit image on the right?
Calculate how many different colours a 5-bit image can use (TIP: Something needs to be the power of something)
Did you enjoy the quiz?
True
False
Pass
for question in quiz_questions: quiz_questions.append(random_answer)
